単一引張パルス波を受ける二重き裂部材の破壊挙動について

抄録

This paper is concerned with the dynamic fracture criterion of a double-cracked plate. The specimen is made of epoxy resin and subjected to a tensile pulse wave, whose height and width are control led. The behavior of the stress wave in the specimen and the crack propagation phenomena are analyzed by the photoelastic technique using a high-speed camera. The dynamic finite element method is also used to estimate the stress-intensity factors at the double crack tips. From these experimental and numerical results, the crack propagation criterion of the double-cracked plate is considered.